The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 31, 2018
Filed:
Dec. 02, 2016
Yuji Nagatomo, Kanagawa, JP;
Tetsumaru Fujita, Kanagawa, JP;
Masato Tsuji, Kanagawa, JP;
Yutaro Kaku, Tokyo, JP;
Yuji Nagatomo, Kanagawa, JP;
Tetsumaru Fujita, Kanagawa, JP;
Masato Tsuji, Kanagawa, JP;
Yutaro Kaku, Tokyo, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A developing device includes a developer bearer facing a latent image bearer, to rotate and supply developer to the latent image bearer, and a developer regulator to regulate an amount of the developer on a surface of the developer bearer. The developer regulator is in contact with the surface of the developer bearer. In the developing device, a ratio of a ten-point mean roughness of the developer regulator to a volume average particle diameter of the developer is not greater than 3.5%. The ratio is defined asRzjis/Dv×100,